Thickness and Temperature Dependence of Exchange Bias in Co/CoO Bilayers

被引：13
|
作者：
Demirci, E. [1 ,2 ]
Ozturk, M. [1 ,2 ]
Topkaya, R. [1 ,2 ]
Kazan, S. [1 ,2 ]
Akdogan, N. [1 ,2 ]
Obaida, M. [3 ]
Westerholt, K. [3 ]
机构：
[1] Gebze Inst Technol, Dept Phys, TR-41400 Kocaeli, Turkey
[2] Gebze Inst Technol, Nanomagnetism & Spintron Res Ctr NASAM, TR-41400 Kocaeli, Turkey
[3] Ruhr Univ Bochum, Inst Expt Phys Festkorperphys, D-44780 Bochum, Germany
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2012年 / 25卷 / 08期
关键词：
MAGNETIC-ANISOTROPY; FERROMAGNETIC-RESONANCE; FILMS;
D O I：
10.1007/s10948-011-1226-1
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The effects of the ferromagnetic (FM) Co layer thickness on magnetic anisotropies and exchange bias (EB) properties of Co/CoO bilayers have been investigated by using ferromagnetic resonance (FMR) and vibrating sample magnetometer (VSM) techniques. The temperature and thickness dependence of EB were studied in temperature range of 4-320 K. FMR and VSM measurements show that Co/CoO bilayers exhibit negative exchange bias just below the blocking temperature (T (B)). Room-temperature in-plane FMR measurements reveal that the Co layer was epitaxially grown on MgO substrate with four-fold magneto-crystalline symmetry. The data also show that the easy axis of magnetization is in the film plane and parallel to the aOE (c) 110 > crystallographic directions of MgO substrate in all samples.
引用
收藏
页码：2591 / 2595
页数：5
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